<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    //无参无返回值
    function f1(){
        console.log("f1");
    }
    f1();
    //有参无返回值
    function f2(name,age){
        console.log(name+":"+age);
    }
    f2("刘备",18);
    //无参有返回值
    function f3(){
        return "这是返回值";
    }
    let info=f3();
    console.log(info);
    //有参有返回值
    function f4(x,y){
        return x*y;
    }
    let result=f4(8,9);
    console.log(result);
    //第二种声明方法的方式
    let f5=function (name,age){
        console.log(name+":"+age);
    }
    f5("张飞",28);
    //第三种声明方法的方式
    let f6=new Function("name","age","console.log(name+':'+age)");
    f6("关羽",20);

</script>
</body>
</html>